Xerox 2135DT Service Guide - Page 61
Dark, stained background
UPC - 042215474696
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Dark, stained background 1. Determine if any of the imaging drums were exposed to light for an extended amount of time. If so, replace any unit which was. 2. Examine the fuser rollers for contamination. Replace the fuser if they are. 3. Ensure the media type is correctly set. 4. Are the power supply fans both running? A heat build-up under the imaging units can cause toner to stain the print's background. 5. Do the imaging drum units make good connection to their power terminals? 6. Are the LED heads wiring harnesses undamaged and properly seated? 7. Is +3.8V (red wire) supplied to Pin 3 of each LED head assembly? If yes, replace the LED head assembly. 8. Is +3.8 V supplied to the POWER connector pins 1, 2, 3, 4, 5, 6, 7 and 8 on the junction board or at the 16-pin interconnect near the top cover hinge (under the top shield plate). Inspect the junction board's wiring connectors. If the voltage is not OK, replace the low-voltage power supply. 9. If +32 volts supplied to the POWER connector pins 7, 8, 9 and 10 on the engine controller board? Inspect the wiring harnesses or replace the low-voltage power supply. 10. Is +32V supplied to the HVOLT connector Pin 5 of the engine board. If not, replace the engine board. (Transfer the old engine controller board's EEPROM (lower-right corner of board) to the new engine controller board.) 11. Inspect the high-voltage wiring harnesses. 12. Replace the high voltage power supply. 48 Phaser 2135 Color Printer